34 lines
883 B
JavaScript
34 lines
883 B
JavaScript
'use strict';
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const LZMA = require('lzma').LZMA;
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module.exports = function lzma () {
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const lzmaWorker = new LZMA();
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return function lzmaMiddleware (req, res, next) {
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if (!Object.prototype.hasOwnProperty.call(req.query, 'lzma')) {
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return next();
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}
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// Decode (from base64)
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var lzma = Buffer.from(req.query.lzma, 'base64')
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.toString('binary')
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.split('')
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.map(function (c) {
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return c.charCodeAt(0) - 128;
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});
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// Decompress
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lzmaWorker.decompress(lzma, function (result) {
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try {
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delete req.query.lzma;
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Object.assign(req.query, JSON.parse(result));
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next();
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} catch (err) {
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next(new Error('Error parsing lzma as JSON: ' + err));
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}
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});
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};
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};
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